There is no two soeaker on bottom!!! There is only one speaker in bottom of the phone which is located on bottom right side of the phone and the left bottom its just the vent and the secound speaker is on the top of the phone ( on the screan)

The silicone case will not disrupt the stereo speakers on the iphone 7. As the case doesn't cover the speakers or any ports. The case also doesn't disrupt the stereo speakers on the top of the phone either.